Questions: Determine the oxidation number for the indicated element in each of the following substances.
S in SO2
Express your answer as a signed integer.
Transcript text: Determine the oxidation number for the indicated element in each of the following substances.
\[
\mathrm{S} \text { in } \mathrm{SO}_{2}
\]
Express your answer as a signed integer.
Solution
Solution Steps
Step 1: Understand the Oxidation Number Concept
The oxidation number (or oxidation state) of an element in a compound is a theoretical charge that an atom would have if all bonds to atoms of different elements were 100% ionic. It helps in understanding the electron transfer in redox reactions.
Step 2: Identify Known Oxidation Numbers
In the compound \(\mathrm{SO}_2\), we need to determine the oxidation number of sulfur (\(\mathrm{S}\)). Oxygen (\(\mathrm{O}\)) typically has an oxidation number of \(-2\).
Step 3: Set Up the Equation
The sum of the oxidation numbers in a neutral compound is zero. For \(\mathrm{SO}_2\), the equation is:
\[
x + 2(-2) = 0
\]
where \(x\) is the oxidation number of sulfur.
Step 4: Solve for the Oxidation Number of Sulfur
Simplify the equation:
\[
x - 4 = 0
\]
Add 4 to both sides to solve for \(x\):
\[
x = 4
\]
Final Answer
The oxidation number of sulfur in \(\mathrm{SO}_2\) is \(\boxed{+4}\).